html,body {
    padding: 0px;
    margin: 0px;
}

/* 开始封图布局 */
#page-1 {
    height: 800px;
    /*  备用 sm.ms 图床，速度慢于微博图床
    background: url(https://i.loli.net/2018/06/26/5b31f3ca141be.png);
    */
    background: url(https://ww1.sinaimg.cn/large/0064NqSIgy1fsov8xp5mbj318g0rix6p.jpg);
    
    background-repeat: no-repeat;
    background-size: cover;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
}
#page-1-color {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.120);
}
#page-1-text {
    margin: 0 auto;
    width: 700px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}
#page-1-text a {
    text-decoration: none;
    font-size: 40px;
    font-weight: bold;
    color: white;
    display: block;
    margin-bottom: 30px;
}
#page-1-text p {
    font-size: 15px;
    color: white;
    display: block;
    text-align: center;
}
#sign-up {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    border: 1px solid white;
    margin-top: 50px;
    padding: 50px 200px 50px 200px;
}
#sign-up-text {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}
#sign-up-text-headline {
    font-size: 20px;
    font-weight: bold;
    color: white;
    padding: 0px;
    margin: 0px;
}
#sign-up-text-nomaltext {
    font-size: 13px;
    color: white;
    padding: 0px;
    margin: 0px;
    font-weight: 100;
    margin-top: 5px;
}
#sign-up-form {
    margin-top: 20px;
}
#sign-up-form input[id=form-email] {
    padding: 10px 40px 10px 40px;
    background-color: transparent;
    color: rgb(255, 255, 255);
    border: 1px solid white;
    border-radius: 3px;
    margin-right: 5px;
}
#sign-up-form input[id=form-email]:-moz-placeholder,sign-up-form input[id=form-email]::-webkit-input-placeholder {
    color: rgb(175, 175, 175);
}
#sign-up-form input[id=form-password] {
    padding: 10px 40px 10px 40px;
    background-color: transparent;
    color: rgb(255, 255, 255);
    border: 1px solid white;
    border-radius: 3px;
    margin-right: 5px;
}
#sign-up-form input[id=form-password]:-moz-placeholder,sign-up-form input[id=form-password]::-webkit-input-placeholder {
    color: rgb(175, 175, 175);
}
#sign-up-form button[id=form-button] {
    padding: 10px 15px 10px 15px;
    color: rgb(0, 0, 0);
    background-color: white;
    border: 1px solid white;
    border-radius: 3px;
    font-size: 12px;
}
/* 封图布局结束 */

/* 介绍一布局开始 */
#introduce-01 {
    background-color: white;
    display: block;
    margin: 100px 200px 100px 200px;
}
#introduce-01-text {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;

}
#introduce-01-text-smallwords{
    font-size: 15px;
    font-weight: 200;
    text-align: center;
    margin: 0px;
    margin-bottom: 20px;
}
#introduce-01-text-bigwords{
    font-size: 30px;
    font-weight: 200;
    text-align: center;
    margin: 0px;
    width: 600px;
}

#introduce-01-feature {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    margin-top: 30px; 
}

#introduce-01-feature div[class=introduce-01-feature-row] {
    display: flex;
}

#introduce-01-feature div[class=introduce-01-feature-content] {
    display: flex;
    padding: 20px;
    justify-content: center;

}
#introduce-01-feature div[class=introduce-01-feature-content] img {
    align-self: flex-start;
    width: 30px;
    height: auto;
    padding: 10px;
    margin-top: 5px;

}
#introduce-01-feature div[class=introduce-01-feature-content] p {
    margin: 0px;
    padding: 0px;
}
#introduce-01-feature div[class=introduce-01-feature-content-text-container] {
    display: block;
    width: 70%;
    padding: 10px;
}
#introduce-01-feature div[class=introduce-01-feature-content] p[class=introduce-01-feature-headline] {
    font-weight: bold;
    margin-bottom: 5px;
}
/* 介绍一布局结束 */
/* 二图布局开始 */
#page-2 {
    height: 800px;
    /*  备用 sm.ms 图床，速度慢于微博图床
    background: url(https://i.loli.net/2018/06/26/5b3233bbb5361.png);
    */
    background: url(http://ww3.sinaimg.cn/large/0064NqSIgy1fsovbe2kzkj318g0m8u0x.jpg);
    background-repeat: no-repeat;
    background-size: cover;
    display: flex;
    flex-direction: row;
    position: relative;
}
#page-2-color {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.120);
}
#page-2-text {
    width:55%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    margin-left: 200px;
}

#page-2-text-headline {
    font-size: 35px;
    color: white;
    display: block;
    text-align: left;
    width: 320px;
    margin-bottom: 20px;
}
#page-2-text-nomaltext {
    font-size: 15px;
    color: white;
    display: block;
    text-align: left;
    width: 350px;
    line-height: 150%;
    font-weight: 100;
    margin-top: 0px;
}

#page-2-text-button {
    display: flex;
    margin-top: 20px;
}
#page-2-text-button-01 {
    padding: 10px 15px 10px 15px;
    color: rgb(0, 0, 0);
    background-color: white;
    border: 1px solid white;
    border-radius: 3px;
    font-size: 12px;
    margin-right: 20px;
    
}
#page-2-text-button-02 {
    padding: 10px 15px 10px 15px;
    color: rgb(255, 255, 255);
    background-color: transparent;
    border: 1px solid white;
    border-radius: 3px;
    font-size: 12px;
}
#page-2-picture {
    width: 45%;
    border: 1px solid white;
    border-radius: 20px 0px 0px 20px;
    margin: 120px 0px 100px 120px;
    display: flex;
    position: relative;
}
#page-2-picture-right {
    display: flex;
    justify-content: center;
    align-items: right;
    margin: 50px 0px 50px 50px;
}
#page-2-picture-left-circle {
    position: absolute;
    width: 8px;
    height: 8px;
    border: 1px solid white;
    border-radius: 50%;
    top: 50%;
    left:20px;
}
/* 介绍二布局开始 */

#introduce-02 {
    background-color: white;
    display: block;
    margin: 100px 200px 100px 200px;
}
#introduce-02-headline {
    text-align: center;
    font-size: 35px;
    font-weight: 300;
}
#introduce-02-feature {
    display: flex;
    justify-content: space-between;
}
#introduce-02-feature div[class=introduce-02-feature-content] {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 250px;
    text-align: center;
    font-weight: 100;
}

/* hr */
hr {
    color: rgb(243, 243, 243);
    border: 1px solid rgb(243, 243, 243);
}
/* 介绍三布局开始 */
#introduce-03 {
    background-color: white;
    display: block;
    margin: 50px 200px 50px 200px;
}
#introduce-03 div[class=introduce-03-row] {
    display: flex;
    display: flex;
    align-items: center;
    justify-content: center;
}

#introduce-03 img[class=introduce-03-row-img-left] {
    margin: 0px 50px 50px 0px;
    width: 65%;
    padding: 30px;
}
#introduce-03 img[class=introduce-03-row-img-right] {
    margin: 0px 0px 50px 50px;
    width: 65%;
    padding: 30px;
}
#introduce-03 div[class=introduce-03-row-text-right] {
    padding: 30px;
    width: 35%;
}
#introduce-03 div[class=introduce-03-row-text-left] {
    padding: 30px;
    width: 35%;
}
#introduce-03 p[class=introduce-03-row-text-headline] {
    font-size: 20px;
    font-weight: bold;
}
#introduce-03 p[class=introduce-03-row-text-normaltext] {
    font-size: 15px;
    line-height: 150%;
}
/* 介绍三布局结束 */
/* 介绍四布局开始 */
#introduce-04 {
    background-color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    margin: 50px 200px 50px 200px;
}
#introduce-04-headline {
    text-align: center;
    font-size: 35px;
    font-weight: 300;
    margin: 0;
    padding: 0;
}
#introduce-04-normaltext {
    text-align: center;
    font-size: 15px;
    font-weight: 200;
    width: 60%;
    margin: 0;
    padding: 0;
}
.introduce-04-feature-content-img-hover {
    position: absolute;
    background-color: transparent; 
    top: 0px;
    left: 0px;
    width: 100%;
    height: 100%;
}
.introduce-04-feature-content-img-hover:hover  {
    position: absolute;
    background-color: rgba(0, 0, 0, 0.349); 
    top: 0px;
    left: 0px;
    width: 100%;
    height: 100%;
}
#introduce-04-feature-1 {
    display: flex;
    margin-top: 30px;
}
#introduce-04-feature-2 {
    display: flex;
}
#introduce-04 div[class=introduce-04-feature-content] {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 400px;
    margin: 10px;
    position: relative;
}
/* 介绍四布局结束 */
/* 联系布局开始 */
#contact {
    background-color: white;
    margin: 50px 200px 50px 200px;
}
#contact-row {
    display: flex;
    align-items: center;
    justify-content: center;
}
#contact-form {
    display: flex;
    flex-direction: column;
    border: 1px solid gray;
    width: 400px;
    padding: 25px;
    border-radius: 5px;
}
#contact-form-title {
    font-size: 20px;
    text-align: center; 
}
#contact-form input {
    padding: 5px;
    margin: 5px;
    width: 300px;
    height: 30px;
    border: 1px solid gray;
    background-color: transparent;
    border-radius: 5px;
}
#contact-form textarea {
    padding: 5px;
    margin: 5px;
    width: 300px;
    height: 120px;
    border: 1px solid gray;
    background-color: transparent;
    border-radius: 5px;
}
#contact-form-button {
    margin: 0;
    padding: 0;
    border: 0;
    padding: 5px;
    margin: 5px;
    margin-top: 10px; 
    margin-bottom: 10px;
    width: 310px;
    height: 40px;
    background-color: black;
    border-radius: 5px;
    color: white;
}
#contact-text {
    margin-left: 100px;
    padding: 100px;
}
#contact-text-title {
    font-size: 35px;
    text-align: left;
    padding: 0;
    margin: 0;
    margin-bottom: 20px;
    font-weight: 300;
}
#contact-text-normaltext {
    font-weight: 100;
    font-size: 15px;
}
#contact-text-address {
    display: flex;
    flex-direction: column;
}
#contact-text-address {
    display: flex;
    flex-direction: column;
}
.coclassntact-text-address-row {
    display: flex;
    align-items: center;
    justify-content: left;
    margin: 0;
    padding: 0;
}
.contact-text-address-img {
    width: 25px;
    margin: 10px;
}
.contact-text-address-text {
    display: flex;
    flex-direction: column;
    line-height: 150%;
    font-weight: 100;
    font-size: 16px;
    font-weight: bold;
}
/* 联系布局结束 */
/* 页脚布局开始 */
#footer {
    background-color: rgb(0, 0, 0);
    display: flex;
    padding: 30px 60px 30px 60px;
}
.footer-container {
    display: flex;
    flex-direction: column;
    align-content: space-around;
    flex-basis: 20%;
    font-size: 12px;
    font-weight: 100;
}
.footer-container a {
    text-decoration: none;
    color: rgb(131, 131, 131); 
    line-height: 200%;
}
.footer-container-headline {
    font-size: 15px;
    color: white;
    font-weight: 300;
}
.footer-container-nomaltext {
    font-size: 12px;
    font-weight: 100;
    color: rgb(131, 131, 131); 
    margin: 0;
    margin-top: 10px;
    margin-bottom: 10px;
}
#footer-container-icon {
    display: flex;
    margin-bottom: 10px;
    
}
#footer-container-icon img  {
    width: 30px;
    align-content: space-around
}
/* 页脚布局结束 */

